// Copyright (c) 2023 PaddlePaddle Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#pragma once

#include "paddle/phi/core/dense_tensor.h"
#include "paddle/utils/optional.h"

namespace phi {

template <typename T, typename Context>
void CudnnLSTMGradKernel(
    const Context& ctx,
    const DenseTensor& x,
    const DenseTensor& init_h,
    const DenseTensor& init_c,
    const paddle::optional<std::vector<const DenseTensor*>>& weight_list,
    const paddle::optional<DenseTensor>& sequence_length,
    const DenseTensor& out,
    const DenseTensor& reserve,
    const DenseTensor& state_out,
    const DenseTensor& out_grad,
    const DenseTensor& last_h_grad,
    const DenseTensor& last_c_grad,
    float dropout_prob,
    bool is_bidirec,
    int hidden_size,
    int num_layers,
    bool is_test,
    int seed,
    DenseTensor* x_grad,
    DenseTensor* init_h_grad,
    DenseTensor* init_c_grad,
    std::vector<DenseTensor*> weight_list_grad);

}  // namespace phi